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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 24 — Nov. 23, 2009
  • pp: 21788–21793

Femtosecond mode-locked fiber laser employing a hollow optical fiber filled with carbon nanotube dispersion as saturable absorber

Sun Young Choi, Fabian Rotermund, Hojoong Jung, Kyunghwan Oh, and Dong-Il Yeom  »View Author Affiliations


Optics Express, Vol. 17, Issue 24, pp. 21788-21793 (2009)
http://dx.doi.org/10.1364/OE.17.021788


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Abstract

We propose a novel in-line saturable absorber incorporating a hollow optical fiber (HOF) filled with single-walled carbon nanotube (SWCNT) dispersion. The evanescent field of the propagating light in the ring core interacts with the SWCNT/polymer composite distributed over the whole length of the HOF. The proposed saturable absorber with all-fiber format offers the robust and long nonlinear interaction along the waveguide direction expecting the increase of the threshold for optical and thermal damages with simple fabrication process. Low concentration SWCNT/polymer composite exhibiting very broadband resonant absorption around 1.5 μm with low scattering loss is prepared and based on this, we successfully demonstrate the passively mode-locked fiber laser including the SWCNT-filled HOF where the spectral bandwidth and the pulse duration of the laser output are 5.5 nm and 490 fs, respectively, with a repetition rate of 18.5 MHz.

© 2009 OSA

OCIS Codes
(140.4050) Lasers and laser optics : Mode-locked lasers
(060.4005) Fiber optics and optical communications : Microstructured fibers
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: October 5, 2009
Manuscript Accepted: November 8, 2009
Published: November 12, 2009

Citation
Sun Young Choi, Fabian Rotermund, Hojoong Jung, Kyunghwan Oh, and Dong-Il Yeom, "Femtosecond mode-locked fiber laser employing a hollow optical fiber filled with carbon nanotube dispersion as saturable absorber," Opt. Express 17, 21788-21793 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-24-21788


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